T. S. Hunt on Norite Rock. 181 
rarely dichroite and quartz, are all Metre found sparingly 
disseminated in these anorthosites of New York and a, 
North America, where it sometimes forms $s or masses 
considerable size. Details as to the chemical and mineralogical 
characters of these rocks will be found in the . & D. Philos. 
Magazine for May, 1855, and also in the Geology of Canada, 
1863, pages 588-590. 
The subsequent investigations of Sir William Logan have 
' shown that these anorthosites in Canada belong to a great series 
son has lately observed it at the mouth of Pentecost ake | 
Ys 
ide f Labrador, where its character- 
idely spread on the coast 0 pai py a 
